BANDEIRA, A. A. S.; http://lattes.cnpq.br/0711892451950121; BANDEIRA, Adna de Alcântara e Souza.
Resumo:
The oil industry has developed very rapidly in recent years due to advances in the
discovery and drilling wells deeper and deeper. Waste is classified by the Brazilian
Association of Technical Standards (ABNT, 2004) as hazardous (Class I). The
stabilization by solidification technology has proved an effective and widely used to
alleviate and treat hazardous waste in addition carry out pre-treat waste before disposal
in landfill. The main objective of this study was to soften Total Petroleum
Hydrocarbons and oils/greases present in oily sludge using oil stabilization by
solidification. This work was performed at the Laboratory of Environmental
Management and Waste belonging to the Academic Department of Chemical
Engineering, Federal University of Campina Grande. It was divided into four stages. In
the first stage we carried out the experimental design. We used the 2 factorial with
three central points. The factors used were the percentage of sludge (10, 15 and 20%)
and curing temperature (0, 20 and 40 0 C). The second step was the characterization and
classification of oil sludge. The third step was performed to evaluate the materials
submitted to the stabilization by solidification using a simple mixture of Portland
cement and organoclay as binders, using criteria of integrity/durability and
immobilization of contaminants. The fourth stage was performed statistical analysis and
mass balance of the process. With this work, we observed that the capacity of water
absorption in the specimens influences the compressive strength and the later leaching.
The content of oils and greases in the oil sludge is an indicator of contamination. With
treatment, achieved a reduction of 86.7% in the concentration of oils and greases,
showing that the stabilization by solidification can be applied as a pretreatment of
hazardous waste before being appropriately disposed of in landfills and industrial and/or
as how to make the attenuation of contaminants. We also observed that the temperature
did not influence the process and that only the percentage of sludge can influence the
results of oils and greases.